Karma test encountered a provider that could not be identified

I am working with a provider called $_ConfigProvider:

(function (angular) {
  angular.module('app')
        .provider('$_Config', ConfigProvider);

  function ConfigProvider() {
      .... //routes definition 
  }
  ConfigProvider.prototype.$get = function () {
    return this;
  };

  ConfigProvider.prototype.getRoutes = function() {...}

  //other prototype functions 

})(angular);

Within my app.js file, I am utilizing it in the following manner:

app.config(function ($routeProvider, $_ConfigProvider) {
    var routes = $_ConfigProvider.getRoutes();
    routes.forEach(function(route) {
        $routeProvider
          .when(route.route, {
           .....
          })

}

Everything works smoothly until it comes to testing. Here is the test script:

describe('Provider: $_ConfigProvider', function () {

  // loading the providers module
  beforeEach(module('app'));

  // initializing the provider
  var $_ConfigProvider;
  beforeEach(inject(function (_$_Config_) {
    $_ConfigProvider = _$_Config_;
  }));


  it('Should validate the getRoutes function', function () {
    var routes = $_ConfigProvider.getRoutes();
    expect(Object.prototype.toString.call(routes) === '[object Array]').toBe(true);
  });
});

Upon running the test, I am encountering the following error:

  Error: [$injector:modulerr] Failed to instantiate module app due to:
  Error: [$injector:unpr] Unknown provider: $_ConfigProvider

Please note: The $_ConfigProvider is correctly injected during run-time.

Answer №1

It seems like you may have forgotten to include the file where the provider is defined in your karma.conf.js dependencies list. Check out this related question:

How to include dependencies in a Karma test file for an Angular app?

You might want to consider renaming $_Config to something else, as '$' typically denotes angular-specific components.

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